You know like those wearing an outfit like worn by Obama in Kenya or some Arab robe, etc., etc. or have in general a "non Western" look to them. Do I have to draw you a picture. This is not 100% perfect but it will catch a lot of them. You don't have to let all the terrorists pass without giving them a good check out because a few may not be spotted?
You would be a good spokesperson for Islam and their program to destroy the West there ace with that attitude. Come back and rejoin decent society here ace. Surely your Christian parents raised you different there ace. Thank you, thank you very much